Granted Patent
Utility
US 5,453,541 · App. 08/157,120
Method of preparing 4-aminodiphenylamine
Inventors:
Michael K. Stern, James K. Bashkin
Patented Case
View Patent ↗
Granted: Sep 26, 1995
Filed: Dec 6, 1993
Inventors
Michael K. Stern
James K. Bashkin
Assignee (at issue)
Monsanto Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.